Раскройте скобки и правильной форме.
1. For many years scientists (to study) the nucleus before they found that it is possible to split it.
2. Many power stations (to use) atomic energy for a long time before I knew it.
3. All this period scientists and engineers (to develop) rocket technology and electronics in close cooperation.
4. We widely (to use) electronic devices in industry for many years.
5. We know that our astronomers (to observe) the moon for a long time.
6. My friend (to make) these experiments to compare the weight of elements since the first of September
7. The question about the new experiment on this subject (to discuss) for some time before we came to a definite conclusion.
8. The fact that atom has a nucleus in its center, which is positively charged, (to discuss) by Ernest Rutherford in 1911.
9. This problem (to solve) in the near future.
10. The phenomenon of radioactivity (to use) widely in industry, medicine and agriculture
11. He found that this effect (to cause) by some unknown subatomic particles.
12. The weights of these particles (to calculate) with the help of electronic computer.
13. U-238 (to convert) into plutonium and then (to use) to generate atomic power.
14. These substances (to refer to) usually as hydrogen isotopes
15. One of the isotopes of hydrogen (to call) deuterium.
16. He (to puzzle) by these unexpected results.
17. It (to show) that these substances differed greatly in their chemical properties.
18. It (to expect) that the results of our research (to apply) in chemical industry.
Can I have some milk in my tea?
2. Can I have something to drink?
3. Are there any chess players here?
4. Is there somebody who can play chess here?
5. I saw something near the wood that looked like a tent.
6. Somebody left a textbook in our classroom yesterday.
7. I am not a perfectionist. Nothing is perfect in this world.
8. Where are you going? – I am not going anywhere.
9. It so happened that he had nowhere to go.
10. We’ve got nothing to eat, we’ve got only something to drink.
11. There were some of my friends there.
12. I am sure nobody has taken your bag.
13. The old man had nobody to help him.
14. The patient has a bad memory. She can’t remember anything.
15. He has got no money. He eats only fast food.
16. Do you live somewhere near Jim?